The 29-year-old Allen has had a busy week since being cut by the New England Patriots, visiting the Browns, Bills, and Lions before heading to Miami.
Originally a third-round pick out of Clemson by the Indianapolis Colts in 2012, Allen spent five seasons in Indy before signing with the Patriots in 2017. The Pats used him primarily as a blocking tight end but he does have a Super Bowl ring to show for his time in New England.